Improvement in valves for steam-engines



G. C. TIMP-E.

Improvement in Valves for Steam-Engines.

N0 132,781, Patented Nov, 5,1872.

vyall Gustavus c. TrMPnon New ORLEANS, LOUISIANA.k

vnaPaovientreir nv VALVES oasTEAMfENGINES.

y Specification forming part ofvlictters Patent No. HSQ'QI, dated November 5, 1872.

`To attachant it may concern:

Beit known thatLGUs'rn- Us C.T1Mrn,of New Orleans, parish ot'` Orleans, and State of Louisiana, have invented `'certain''Improve-T ments in Valves for Steam-Engines,fof which thevfollowin g is a specification: *i Figure lis a plan or -topview-of a steam engine cylinder, showing the valves for reversing themotion ofthe piston, the lever by which such valves are moved, and the steamfports in valve-seats; Fig. Zlis a plan view of theunder side of the induction-valve seat, showing the induction and eduction steam-.ports 5` Fig.- 3 is a vertical Ylongitudinal section on line a' a@4 of Fig. `1 of a cylinder having upon it a seat adapted to myimproved valves, andvshowing the main val-ve with its 'reversible seat' and' the steam-chest; Fig. 4 is a-similarsection on line y y ofthe same figure, showing theyalve which admits steamto the lmain chest, andH which, in conjunction with the-reversible seat,- reverses themovementsofnthe piston 5 Fig. 5' is a longitudinal sectional elevation of the main or eduction andgindnctionzvalve, showing its ports for the induction :andueduction of steam, Fig. 6 is a transverse section on line m of Fig. 5,' showing the exhaust-passages; and Fig. 7 is a sectional elevation, showing how the main valve may be used without a steam-chest, if desired.

Identical parts in the several igures are designated by corresponding letters.4

This invention relates to the valves of steam and other engines 5 and it consists of the construction oi' such valves, and in certain combinations and arrangements thereof with and with reference to a reversible seat and to the openings therein, whereby the movements of the piston of the engine may lie-reversed at pleasure without the aid of eccentrics, arms, or any extra mechanism, except a sin gle lever and its constructions.

In adapting my improved valves to use I use any approved form of cylinder, A, which has upon it two separate and distinct valveseats with ports arranged to accommodate the reversing valve, and the reversible seat of the main or induction and eduction valve. That 4portion of this cylinder through which its induction and eduction passages are formed is raised above the general surface of said cylinder, as shown at A', Figs. 3 and 4. Cast in,

i' one rpiece with or attached to this raised portion of the cylinder there is a steam-el1est,B,

y which is divided longitudinally into two comthrough which the steam passes to theeduc;

tion-pipe D, whether the valve C is in, the' position shown in Fig. l or is thrown tothe op posite end of its range of movement,y the steam being admitted to this apartment ofthe-chest through the inductionlpipe'D. In the'` valve-L seat of this compartment ofvthechest there are three-ports, G1, O2, and C, Gl and G2V being inductionports, and C3- being an eduction-.- port, and the constructionof the valve':Gand` its arrangement with reference tothe portsis such; ythat Awhen lthe ,valve `is in` lthe position showninFig. 1 steam or any other. motive agent which may beemployed will enter the port Ct and pass from'it to main valvev through- `ports soon to be described.- 'Underneath the.

main valve there is placed Auponthe valvefseat ofthe cylinder.- an adjustableseat-valve,r 1E, which, when moved to the proper position, operates as a cut-oft' as well as a seat for said valve, the ports in this valve being so arranged as to register with the ports in said main valve and in the seat upon the cylinder. It will be noticed that the seat-valve E is made in two sections, its form being shown in Fig. l, the object being to enable the operator to change the ports at either end, so as to cause them to act as a cut-oil' while the steam is being admitted at either end. The movement ot the sections of the valve is effected by means of the lever F, which is pivoted to the steamchest and to a supplemental lever, F', which has a fulcrum in that of the lever F, and is so arranged with reference thereto that, upon moving said lever F to reverse the movements of the piston by changing the position of the induction or reversing-valve (l, the section of the valve E, which, for the time being is admitting steam. to the main valve, will be brought into position to cause the steam to be cut off at the proper point, such point depending upon the amount of movement imparted to the seat-valve E by the rods which extend from the lever F through a stuffing-box in the end of the steamehest for the purpose. The

main or induction valve G is of peculiar construction, as will be seen by referring to Figs. 3, 5, and 6, where it will be seen that it has a series of openings, 1, 2, 3, 4, 5, and 6 and, supposing the lever F to be in the position shown in Fig. 1, the port G1 will be the inductionport, from which steam will enter from the small compartment of the chest and pass through port C up into the passage in the upper portion oi' the valve to and through port 1, and from thence to the opposite end of the cylinder, as shown by the full arrows in Fig. 3, at which time steam will be exhausting through ports 2 and 5, and out through ports C2 and G3 of valve C to the exhaust-pipe D, when, if the position of valve Gr is changed by its moving mechanism so as to admit steam to the opposite end of the cylinder through port 4, the steam which first entered will be exhaustcd through ports 1 and 5 into ports C2 and C and exhaustpipe D, and so on alternately as the position of the main valve is changed, the

position of the parts in the seat-valve E determining the amount of steam admitted to the cylinder at each stroke of the piston.

When it is desirable to reverse the Inoveinents of the piston so as to cause the engine to run in an opposite direction, the outer end of the lever F is to be moved outward or away from the steamchest, so as to cause the valve C to cover the opening C1 and open the 'port- G2, which will reverse the direction of the steam, and cause the ports, which before were induction-ports, to become eductionports, and vice versa, and at the saine time will change the ports in the seat-valve so as to cause to cnt off at the proper point under the changed condition of induction-ports.

I have shown in the drawing (Fig. 7) a modification of the chest by which I am enabled to use an open chest, or to use my improved main valve without a closed chest, if it should become desirable. It will be seen that the steam does not come in contact with i any portion of valve Gr,-except its under surface, and hence it is not necessary that it should be inclosed, the only requirement being that a bar of metal should be placed above the valve, so that rollers or a spring may be used to hold the valve down, as shown in the figure last referred to.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The main or induction and eduction valve G of a steam-engine, constructed substantially. asset forth and shown, whereby its ports may be used both as induction and eduction ports alternately for the purpose speciiied.

2. In combination with a steam-engine, an induction or throttle valve, C, arranged substantially as shown and described, whereby the movements of the piston of the engine may be reversed, or the steam excluded entirely from the engine, for the purpose speciied.

3. The combination and arrangement of the valves C and G, levers F F', and the scatvalve E, it being substantially such as is described, and for the purpose set forth.

4. The combination of the induction and eduction valve G, and the adjustable seat-valve E, constructed and arranged substantially as and for the purpose specied.

In testimony whereofI have hereunto signed my name this 20th day of May, A. D. 1572, in presence of two subscribing witnesses.

` GUSTAVUS C. TIMPE. Witnesses:

J. F. LEHRMANN, C. TIMPE. 

